Electric-lamp socket.



G. C. KNAUPF.

ELECTRIC LAMP SOCKET.

Iii

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GEORGE C. KNA'UFF, 0F CHICAGO, LLINOIS.

ELECTRIC-LAMP SOCKET.

License,

` Specification' of `llietters Patent.

Application filed November 14 1913. ,Serial 310.800,943.

To aZZ whom t may concern v A i Be it known that I, GEORGE C. KNAUFF, a citizen of the United States, residing at Chin cago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Electric-Lamp Sockets; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relatesto sockets for incann descent lamps, and to means for securing such a socket simultaneously to a reflector and a handle to constitute a portable or socalled trouble finder lamp.

lt has become customary for owners of automobiles equipped with electrical head and tail lamps to utilize the available current for lighting a portable lamp so as'to illuminate any desired parts of the mechanism of the automobile, the light being concentrated in `the desired direction by a reflector mounted In the drawings, Figure 1 shows a longi` tudinal section through a portable lamp equipment embodying my invention. Fig. 2 is an end .view of Fig. 1 with the lamp omitted. Fig. 3 is a fragmentary elevation of the end ofthe socket coupled to the lamp. Fig. l is an enlarged fragmentary section of` the casing of the socket, showing the method: of forming the stop formation. Fig. 5 is ai fragmentary section showing another method of fastening the main and auxiliary' casingsof the socket to each other. Fig. 6

1s a fragmentary view showing the auxiliary casing slid out of its .normal position to facilitate the wiring of the socket.y

In the drawings, the handle l is equipped with a differential bore extending longitudinally thereof, the larger bore vbeing approximately equal to the outer diameter .of the` metal casing 2 of the lamp socket, which casing is equipped at its forward end 4with bayonet slots 3 coperating with projections upon the base ofthe lamp 5 to couple the said lamp'to thecasing. The rear end of the casing 2 is equipped with a tubular eX- tension 6, preferably of a smaller diameter than the main casing 2, which extension has at `its rear `end a threaded portion 7 engaging threads upon a bushing 8 housed at the rear end of the handlev 1. Intermediate of.

the rear end of the bayonet slots 3 and the forward end of the handle 1, 4the vcasing 2 is equipped with a lateral iange 9, which flange is formed integral with the casing radially distending the adjacent portions of the casing and longitudinally compressing the casing. interposed betweenv the said' flange and the adjacent end of the handle 1 are an insulating washer 10 and the rear end of a reflector 12, the said washer having a bore corresponding to the casing 2 anda periphery engaging the shoulder portions -11 of the reflector at the juncture lof thel lateral wall-thereof with the rear end thereof. The said rear end of the-'reflector is preferably considerably larger in bore than the outer diameter of the` casing 2 ,so as to be out of` contact withA the latter, thereby en.

abling the washer `10 to insulate the reflector from the inner wall, while the interiitting of the washer with thev casing and the shoulder portion of the reflector respectively will hold the said parts in their normally spaced relation. Thelamp 5 has its base equipped with a metal shell 13 and with an -aXially disposed contact llinsulated therefrom, the said ,shell and ycontact being respectively connected to the ends of the lamp iilament.

Mounted within the main casing 2 and slidably fitting the interior thereof is an :auxiliary `casing 15 housing an insulating Patented sept; 1, 1914. l

slid out of the main casing, as shown in 6, thereby 'permittin the terminals 21 f "an 22 of the clrcuitto e secured respeciliary casing 15. When the body portion of tively to thewire terminals 17 and the auxthe socket has been thus wired, it can readily be slid to its normal position and secured therein either by a screw20, or by forming indentations 23 in both the casings, as in- Fig. 5'.

It will beevident from the drawings that by rotating the casing of the socket and the tubular extension thereon with respect 'to-the bushing or nut 8, the threaded con- Iiection between the latter and the extension 6 will move the casing longitudinally of the handle so as to dra'w the ange 9 into k,forcible abutment with the washer 10, thereby locking the relector 12 between the said -washer and the handle 1 and securing the socket and, reector members of my appli- I'ance simultaneously and rigidly to the handle thereof. f It will also be evident from Fig. 6 that the socket .of my invention can. easily be 'wired by anordinary workman even if made in the miniature corresponding to the lamps commonly used in automobile lighting, and that the integral iiange formation upon the socket casing will afford a simple y method of anchoring the latter without the use of auxiliary parts. However, I do not wish to be limited to the .precise details of the .construction herein disclosed, as the same might be modified in many ways without departing from the spirit of my inven- 'tion as shown in the appended claims.

I claim as my invention:

1. A socket for a lamp having its filament terminals connected respectively to a shell and an axially disposed contact, including av lcasing equipped with means for coupling i the lamp thereto, an axially disposed wire terminal housed by the casing and insulated therefrom, and a cylindrical wire terminal interposed between the aforesaid wire terminal and the casing and contacting with the latter to carry current tl1ereto, the said cylindrical wire terminal slidingly inter' tting the casing and being movable beyond the end of the said casing to permit access to both wire terminals for attaching wires thereto.

2. In a socket, lamp and reflector com-l bination, a tubular handle, a centrally perforated reflector disposed at one end thereof, contact members housed by the said tubular handle and connected to the terminals of a circuit; a tubular member comprising in integral formation a shell 'equipped with means for coupling the said lamp thereto, a casing interposed between an end portion of the said handle and the said contact members and contacting with one of the latter, and an extension upon the said casing extending approximately to the other end of the said handle; an insulating washer housed by the reiiector, there being an enlargement upon the tubular member interposed between the said shell and casing and engaging the said washer; and means coperating with the said handle and tubular member for forcing the said enlargement against the said washer to simultaneously fasten the handle to the reiector and the tubular member.

3. In a socket for an electric lamp equipped upon its base with a shell and an axially disposed contact connected respectively to the ends of the lamp iilament, the combination with a tubular casing having one end slidingly fitting the said shell of the lamp and equipped at its said end with means for coupling the casing to the lamp, of an auxiliary casing slidingly and contactingly fitting the interior of the tubular casing and connected to one terminal of a circuit, an insulating body mounted in the auxiliary casing, a wire terminal carried by the insulating body and connected to the other terminal of the circuit, an extension carried by the said wire terminal and contacting with the said axially disposed contact, and a spring interposed between the said extension and the wire terminal carrying the same, and pressing said extension against the said contact.

4. In a lamp socket, the combination with a tubular support, of a socket casing housed by the said supportand projecting at one end beyond the said support and equipped at its said end with means for coupling a lamp thereto, the said casing equipped adjacent to the said coupling means with a lateral iange engaging the adjacent end of the said tubular support; means threaded upon the other end of the said casing and engaging the tubular support and coacting with the latter to force the said flange against the end of the tubular support adjacent to the latter, thereby rigidly securing the said casing to the said support; and wire terminals carried by the said easing and contacting with the terminals of the said lamp.

5. A lamp socket including a casing and a tubular support therefor, the said casing equipped both with an extension housed by the said tubular support and with a lateral d In testimony whereof I have signed :ny

ange formed by radially distending an name in presence of two subscribing wltlongtngnally compressing a. portlon of the sind ca'slng; and meansncarred by the said nesses. extension and coact'mg with the said snp- GEORGE C. KNAUFF.

-5 port to move the said vextenslon'atnd casmg Witnesses:

relatwfely'tothe said support to clamp the ALBERT SGHEIBLE, M. M. BoYLE.

said support therebetween.

Coplelot this patent may be obtained for ive cents each, by addressing the Commissioner of Paten, Washington, D. 0. 

